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我国的植保方针是什么？简述其含义和特点？

答案

参考答案：

植保方针：预防为主，综合防治，其含义是：从生态系统的整体观点出发，本着预防为主的指导思想和安全、有效、经济、简便的原则，因地因时制宜，合理运用农业的、生物的、化学的、物理的方法，以及其他有效的生态手段，把害虫控制在不足危害的水平，以达到保护人畜健康和增产的目的。

特点：1、允许害虫在经济受损允许水平下继续存在

2、以生态系统为管理单位

3、充分利用自然控制因素

4、强调防治措施间的相互协调和综合

5、经济效益、社会效益、生态效益全盘考虑

单项选择题

The first time I remember noticing the crossing guard was when he waved to me as I drove my son to school. He (31) me with a puzzle-all because he waved to me like someone does on seeing a close friend. A big, (32) smile accompanied his wave. For the next few days I tried tO study his face to see if I knew him. I didn’t. Perhaps he had (33) me for someone else. By the time I contented myself with the conclusion that he and I were strangers, we were greeting each other warmly every morning like old friends.

Then one day the (34) was solved. As I approached the school he was standing in the middle of the road (35) his stop sign. I was in live behind four cars. Once the kids had reached the safety of the sidewalk, he lowered his sign and let the cars (36) . To the first he waved and smiled in just the same way he had done to me over the last few days. The kids already had the window down and were happily waving their reply. The second car got the same (37) from the crossing guard, and the driver, a stiff-looking businessman, gave a brief, almost awkward wave back. Each following car of kids on their way to school (38) more heartily.

Every morning I continued to watch the man with interest. So far I haven’t seen anyone (39) to wave back. I find it interesting that one person can make such a difference to so many people’s lives by doing one simple thing like waving and smiling warmly. His (40) armed the start of my day. With a friendly wave and smiling fade he had changed the feelings of the whole neighbourhood.

35（）。

A. drawing back

B. putting on

C. handing in

D. holding out
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问答题

资料14提到了B市对停车位问题的新举措，请对这些举措进行概述。
要求：观点明确，分析全面；表述准确、有理有据；不超过400字。
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